1. 项目说明：
-
板子包含三个按键，两个LED灯。按键1控制LED1，按键2控制LED2
-
按键1单击->LED1闪烁，按键1双击->LED1常亮，按键1长按->LED1常灭。
-
按键2单击->LED2闪烁，按键2双击->LED2常亮，按键2长按->LED2常灭。
-
按键的状态通过事件集方式通知LED状态。 5. 按键的控制采用multi_button组件，监测按键状态
2. 硬件说明：
开发板中，按键1接在PB5，按键2接在PA11，按键3接在PB3，LED1接在PA12，LED2接在PB4。如 下图：
3. multi_button组件
multi_button是利用线程的方式来检测按键输入的状态，它支持检测按键的单击，双击，长按三种状 态。
3.1 初始化按键：
cpp
void button_init(button_t handle, uint8_t pin_index, uint8_t(*pin_level)(button_t
handle), uint8_t active_level);
3.2 按键绑定事件回调：
cpp
void button_attach(button_t handle, uint8_t event, BtnCallback cb);
3.3 启动按键事件监控：
cpp
启动按键事件监控：
int button_start(button_t handle);
3.4 暂停按键事件监控：
cpp
void button_stop(button_t handle);
3.5 按键生命周期检测函数（注意：需要放在线程中调用）
cpp
void button_ticks(void);4.代码编写
CubeMX配置
代码编写
cpp
#include "multi_button.h"
#include "stm32f1xx_hal.h"
#include <rtthread.h>
#define BTN_THREAD_STACK 1024
#define LED_THREAD_STACK 1024
#define BTN1_SIGLE_EVENT (0X01 << 0)
#define BTN1_DOUBLE_EVENT (0X01 << 1)
#define BTN1_LONG_EVENT (0x01 << 2)
#define BTN2_SIGLE_EVENT (0X01 << 3)
#define BTN2_DOUBLE_EVENT (0X01 << 4)
#define BTN2_LONG_EVENT (0x01 << 5)
#define BTN3_SIGLE_EVENT (0X01 << 6)
#define BTN3_DOUBLE_EVENT (0X01 << 7)
#define BTN3_LONG_EVENT (0x01 << 8)
typedef enum{
KEY1_INDEX=1,
KEY2_INDEX,
KEY3_INDEX,
KEY_END
}bnt_key;
struct rt_event btn_event;
struct rt_thread btn_thread_handle;
static uint8_t btn_stack[BTN_THREAD_STACK];
struct rt_thread led_thread_handle;
static uint8_t led_stack[LED_THREAD_STACK];
static struct button key1_btn;
static struct button key2_btn;
static struct button key3_btn;
void led_flash(rt_uint16_t index,rt_uint16_t event)
{
if(index==KEY1_INDEX)
{
if(event==BTN1_SIGLE_EVENT)
{
HAL_GPIO_WritePin(GPIOA,GPIO_PIN_12,GPIO_PIN_RESET);
rt_thread_delay(200);
HAL_GPIO_WritePin(GPIOA,GPIO_PIN_12,GPIO_PIN_SET);
rt_thread_delay(200);
HAL_GPIO_WritePin(GPIOA,GPIO_PIN_12,GPIO_PIN_RESET);
rt_thread_delay(200);
HAL_GPIO_WritePin(GPIOA,GPIO_PIN_12,GPIO_PIN_SET);
rt_thread_delay(200);
}
else if(event==BTN1_DOUBLE_EVENT)
{
HAL_GPIO_WritePin(GPIOA,GPIO_PIN_12,GPIO_PIN_RESET);
}
else
{
HAL_GPIO_WritePin(GPIOA,GPIO_PIN_12,GPIO_PIN_SET);
}
}
else if(index==KEY2_INDEX)
{
if(event==BTN2_SIGLE_EVENT)
{
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_4,GPIO_PIN_RESET);
rt_thread_delay(200);
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_4,GPIO_PIN_SET);
rt_thread_delay(200);
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_4,GPIO_PIN_RESET);
rt_thread_delay(200);
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_4,GPIO_PIN_SET);
rt_thread_delay(200);
}
else if(event==BTN2_DOUBLE_EVENT)
{
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_4,GPIO_PIN_RESET);
}
else
{
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_4,GPIO_PIN_SET);
}
}
}
void bnt_thread(void* parameter) //线程里调用button的生命周期
{
while(1)
{
/* 按键生命周期检测 */
rt_thread_delay(5);
button_ticks();
}
}
void led_thread(void* parameter) //led线程
{
rt_uint32_t rev;
while(1)
{
rt_event_recv(&btn_event,0xFFFFFFFF,RT_EVENT_FLAG_OR|RT_EVENT_FLAG_CLEAR,RT_WAITING_FOREVER,&rev);
switch(rev)
{
case BTN1_SIGLE_EVENT:
led_flash(KEY1_INDEX,BTN1_SIGLE_EVENT);
break;
case BTN1_DOUBLE_EVENT:
led_flash(KEY1_INDEX,BTN1_DOUBLE_EVENT);
break;
case BTN1_LONG_EVENT:
led_flash(KEY1_INDEX,BTN1_LONG_EVENT);
break;
case BTN2_SIGLE_EVENT:
led_flash(KEY2_INDEX,BTN2_SIGLE_EVENT);
break;
case BTN2_DOUBLE_EVENT:
led_flash(KEY2_INDEX,BTN2_DOUBLE_EVENT);
break;
case BTN2_LONG_EVENT:
led_flash(KEY2_INDEX,BTN2_LONG_EVENT);
break;
case BTN3_SIGLE_EVENT:
break;
case BTN3_DOUBLE_EVENT:
break;
case BTN3_LONG_EVENT:
break;
default:
break;
}
}
}
uint8_t read_pin_level(button_t handle) //读电平的函数
{
int index=handle->pin_index;
if(index==KEY1_INDEX)
return HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_5);
else if(index==KEY2_INDEX)
return HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_11);
else if(index==KEY3_INDEX)
return HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_3);
}
void bnt_callback(button_t btn, PressEvent event) //当有事件产生的时候调用这个回调函数
{
int index=btn->pin_index;
if(index==KEY1_INDEX)
{
if(event==SINGLE_CLICK_EVENT)
{
rt_event_send(&btn_event,BTN1_SIGLE_EVENT);
rt_kprintf("single,index:%d\n",index);
}
if(event==DOUBLE_CLICK_EVENT)
{
rt_event_send(&btn_event,BTN1_DOUBLE_EVENT);
rt_kprintf("double,index:%d\n",index);
}
if(event==LONG_PRESS_HOLD_EVENT)
{
rt_event_send(&btn_event,BTN1_LONG_EVENT);
rt_kprintf("long,index:%d\n",index);
}
}
else if(index==KEY2_INDEX)
{
if(event==SINGLE_CLICK_EVENT)
{
rt_event_send(&btn_event,BTN2_SIGLE_EVENT);
rt_kprintf("single,index:%d\n",index);
}
if(event==DOUBLE_CLICK_EVENT)
{
rt_event_send(&btn_event,BTN2_DOUBLE_EVENT);
rt_kprintf("double,index:%d\n",index);
}
if(event==LONG_PRESS_HOLD_EVENT)
{
rt_event_send(&btn_event,BTN2_LONG_EVENT);
rt_kprintf("long,index:%d\n",index);
}
}
else if(index==KEY3_INDEX)
{
if(event==SINGLE_CLICK_EVENT)
{
rt_event_send(&btn_event,BTN3_SIGLE_EVENT);
rt_kprintf("single,index:%d\n",index);
}
if(event==DOUBLE_CLICK_EVENT)
{
rt_event_send(&btn_event,BTN3_DOUBLE_EVENT);
rt_kprintf("double,index:%d\n",index);
}
if(event==LONG_PRESS_HOLD_EVENT)
{
rt_event_send(&btn_event,BTN3_LONG_EVENT);
rt_kprintf("long,index:%d\n",index);
}
}
}
int riceboard_init()
{
/* 创建事件集 */
rt_event_init(&btn_event, "btn_event", RT_IPC_FLAG_PRIO);
/* 创建线程 */
rt_thread_init(&btn_thread_handle,"thread1",bnt_thread,NULL,btn_stack, 256,10,10);
rt_thread_init(&led_thread_handle,"thread2",led_thread,NULL,led_stack, 256,10,10);
rt_thread_startup(&btn_thread_handle);
rt_thread_startup(&led_thread_handle);
/* 按键初始化 */
button_init(&key1_btn, KEY1_INDEX,read_pin_level, 0);
button_init(&key2_btn, KEY2_INDEX,read_pin_level, 0);
button_init(&key3_btn, KEY3_INDEX,read_pin_level, 0);
/* 绑定按键 */
button_attach(&key1_btn,SINGLE_CLICK_EVENT|DOUBLE_CLICK_EVENT|LONG_PRESS_HOLD_EVENT, bnt_callback);
button_attach(&key2_btn,SINGLE_CLICK_EVENT|DOUBLE_CLICK_EVENT|LONG_PRESS_HOLD_EVENT, bnt_callback);
button_attach(&key3_btn,SINGLE_CLICK_EVENT|DOUBLE_CLICK_EVENT|LONG_PRESS_HOLD_EVENT, bnt_callback);
/* 启动按键事件监控 */
button_start(&key1_btn);
button_start(&key2_btn);
button_start(&key3_btn);
}
INIT_APP_EXPORT(riceboard_init); //自动初始化函数实验现象：
1.打开串口终端观察现象（灯光按预期效果闪烁、长亮、停止）
